Heat up a pot of water(i use a brining pot) to a simmer, pour it down any drain and that clog is gone.
You don’t need to boil anything and the exact temperature does not matter.
fill a big pot with tap water, heat it up to a near simmer, dump it directly down the drain.
That’ll give the clog a good punch and the weight of the next gallon or two you heated up will get rid of the rest of it.
Got a plastic P trap under that sink drain? You can unscrew the fittings by hand, no wrench needed. Catch the water in a small bucket and clean it out by hand. Screw everything back on by hand. Take pictures when removing the fittings if you’re nervous about putting it back together
No idea why I didn’t think of just removing the whole plastic piece. I always wondered why they never had a cleaning point, but why have one when they come off, I guess.